LG 55QNED85SQA Service Manual page 42

Contents of Standard Repair Process Detail Technical Manual
No. Error symptom
1
A. Video error_ No video/Normal audio
2
3
A. Video error_ video error /Video
lag/stop
4
5
A. Video error _Vertical/Horizontal bar,
6
residual image, light spot
7 A. Video error_ Color error
<Appendix>
8
Defected Type caused by T-Con/
Module
Content
Check Back Light On with naked eye
Check White Balance value
TUNER input signal strength checking
method
Version checking method
Tuner Checking Part
Connection diagram
Check Link Cable (Vx1/EPI) reconnection
condition
Check Cable (1) ~ (2)
Exchange Main Board (1) ~ (3)
Exchange Module (1) ~ (3)
Exchange T-Con (1) ~ (2)
Exchange Power Board(PSU)
Page Remarks
A1
A2
A3
A4
A5
A6
A7
A-1/11 ~ 2/11
A-3/11 ~ 5/11
A-6/11 ~ 8/11
A-9/11 ~ 10/11
A-11/11
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